I think short-term thinking and money is undermining our national security in different areas. We learned that we were woefully unprepared for a pandemic, and we can't blame any one government or party on that. I'm sure there's a myriad other ways we're sleeping at the switch, and maybe it would keep some of us up at night.
We've already seen how the Chinese government and certain private interests in the China have undermined our national security in the name of money and complacency.
No doubt not funding vaccine facilities has saved taxpayers money to spend on other goodies we like, but it's also cost us lives. Again, short term interests. Most politicians, especially the ones savvy enough to rise towards the top, are above everything else worried about getting re-elected.
I think it's similar with our military. We don't really have a strong need for a capable military at the moment, but if we were ever attacked i'm sure we would be woefully unprepared and would need to rely on the US and other allies. If it were a situation of every country for themselves, like in a pandemic, we'd be screwed.